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Total

DNS

Email

Security

Network

100

Availability

Domaintcd.ie

IPv42

IPv60

MX records1

StatusActive

Domain technical report

Trinity College Dublin

tcd.ie

Generated: 2026-08-09T00:31:57-05:00 · Cached result

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IPv42

IPv60

MX1

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

1 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

181 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: afef5696a78b683ae.awsglobalaccelerator.com

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)

15.197.242.139
3.33.249.246

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

10 tcd-ie.mail.protection.outlook.com.

TXT

12 record(s)

"d365mktkey=jHusVOIxhFdqyiqVNzZIAZbf5JO9KYHH2xAmqQ4FhSAx"
"apple-domain-verification=6d6n3eRPNHXeQzIv"
"google-site-verification=535E0mjM6BC8LKGeWZPiDTUfBWWVRO6df5G5Gxz9CYE"
"google-site-verification=UBheMj-WKimynXvOEXFLk1-PUd8B6S91wIea98PFIuA"
"docusign=08237f08-1bc7-4ced-866f-2f091ca1e091"
"amazonses:94slst6Hz90gKbyQVRj88Jrtkk//vCnWShfHzXbjfRU="
"v=spf1 ip4:134.226.14.40 ip4:134.226.251.0/21 include:spf.protection.outlook.com include:_spf.google.com include:netaffinity.net include:_spf.eu.messagegears.net include:mh.blackboard.com -all"
"docusign=7a164078-c20a-4d3e-a1ce-87b780e3850e"
"dell-technologies-domain-verification=tcd.ie_e68f91b5-b6b5-4a56-8196-a2821b60705d_1760793096"
"brevo-code:70df7540dafa8ea20f0eccbc493bb5ae"
"klaviyo-site-verification=Tvbv8j"
"LS0wGCXdOiSqamEg/ogaY8TFrKtppR0sIAYcLNO7M38AoQDAXMqFhjVv3zazNI4Tb/BvzZONCn8xReirme7RYQ=="

NS

4 record(s)

auth-ns2.tcd.ie.
auth-ns2.ucd.ie.
auth-ns1.tcd.ie.
auth-ns3.tcd.ie.

SOA

1 record(s)

auth-ns1.tcd.ie. hostmaster.tcd.ie. 2018053144 10800 3600 2419200 300

SPF

Configured

v=spf1 ip4:134.226.14.40 ip4:134.226.251.0/21 include:spf.protection.outlook.com include:_spf.google.com include:netaffinity.net include:_spf.eu.messagegears.net include:mh.blackboard.com -all

DMARC

Configured

v=DMARC1; p=reject; sp=none; rua=mailto:dmarc_agg@vali.email, mailto:5e71390ec666207@rep.dmarcanalyzer.com; ruf=mailto:5e71390ec666207@for.dmarcanalyzer.com; fo=1;

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvrwqmhsziyFO0PA2tnI4/xPrmTIKgi3MjrRjb90eyynXGct7i33N3mfqq7mw+vWe/DVNUFSmEb4aOFnoWsWixD7BeRdVcSZBmU7I8ZbbMPmJeNibClUchgIQe1IudZir0BZwvEdCKBcdCTvaAtlGI8C+IzCagC+oNfX1m3PgnvQIDAQAB; n=1024,1453704607,1

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Trinity College Dublin

Description

Final URL

https://www.tcd.ie:443/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.tcd.ie:443/

Version

Server

Apache

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Hellenic Academic and Research Institutions CA

*.tcd.ie

Valid from

2026-07-22T15:04:28-05:00

Valid until

2027-02-06T14:04:27-06:00

Days remaining

181

Protocol

TLSv1.3

Cipher

TLS_AES_128_GCM_SHA256

Security headers

2 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

✓

X-Frame-OptionsImplemented

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

15.197.242.139, 3.33.249.246

61,65 ms

Cloudflare

1.1.1.1

15.197.242.139, 3.33.249.246

266,97 ms

Quad9

9.9.9.9

15.197.242.139, 3.33.249.246

153,14 ms

OpenDNS

208.67.222.222

15.197.242.139, 3.33.249.246

244,06 ms

AdGuard

94.140.14.14

15.197.242.139, 3.33.249.246

603,46 ms

IP, geolocation and ASNAssociated network information

15.197.242.139

No data

success

country

region

city

asn

organization

isp

3.33.249.246

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

tcd-ie.mail.protection.outlook.com

Port 25: Closed/unreachable - 35.9 ms - 
Port 465: Closed/unreachable - 4019.8 ms - 
Port 587: Closed/unreachable - 4008 ms -

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